Start a pot of water to boil. Saute onions and garlic until softened in a medium skillet sprayed with PAM, medium heat. Season shrimp with Jerk seasoning add to the skillet and cook until pink (about 3-5 minutes)
Remove vegetables and shrimp to a bowl. Add butter to skillet used to cook shrimp and veggies. use whisk to scrape up bits from bottom of skillet.

Whisk in white wine and reduce two thirds. whisk in the cornstarch, dissolved in 2 tablespoons water to the sauce. Keep boiling until thickened and turn off heat. Add the pasta to boiling water. with about two minutes left, add in the tomatoes and spinach. Strain pasta and combine with the sauce, vegetables, shrimp and noodles. Transfer into serving dishes.